package com.itheima.operator;

public class zuoye {
    public static void main(String[] args){
        // 片段1
        int a = 10;
        {
            a = 20;
            System.out.println(a);
        }
        // 片段2
        int b = 20;

        {
            System.out.println(b);
        }
        b = 30;
        System.out.println(b);
    }
}
